Hi All,
Below link has explanined few problem during SSO configuraion.
I am adding few more troubleshooting points and I hope this will help you 100%.
1. Error while Loading PSE (PSE File does not exist/missing)
Solution : Right click on the red icon and choose Create. A pop up with the default filled information will appear.
Just press enter. Now, the error messages will remove.
This will create SAPSYS.PSE file at below path:
Drive:\usr\sap\SID\DVEBMGS00\sec\SAPSYS.pse
2. login/accept_sso2_ticket parameter must be set to 1. This is dynamic parameter, you can set to 1 via RZ11 temporarly.
3.